The most expensive house in the United States has gone to hedge fund manager Barry Rosenstein.

The Jana Partners founder has agreed to pay $147 million for an 18-acre waterfront estate in East Hampton, N.Y. The deal easily breaks the previous record, set just two weeks ago in Greenwich, Conn., where a 50-acre waterfront spread sold for $120 million.

The estate was designed by Tweedy, Browne Co.’s Christopher Browne and his partner, architect Andrew Gordon. Browne died in 2009 and Gordon last year. Browne paid just $13 million for the property, 60 Further Lane, in 1997.